java实例--系统登录

class Check{
    public boolean validate(String userName , String password){
        if(userName.equals("zb")&&password.equals("123456")) {
            return true ;
        }else{
            return false ;
        }
    }
}
class Operate{
    private String info[] ;
    public Operate(String info[]){
        this.info = info ;
    }
    
    public String login(){
        Check check = new Check() ;
        this.isExit() ;
        String str = null ;
        String userName = this.info[0] ;
        String password = this.info[1] ;
        if(check.validate(userName,password)){
            str = "欢迎"+userName+"光临" ;
        }
        return str ;
    }
    public void isExit(){
        if(this.info.length!=2){
            System.out.println("输入的参数不正确，请重新输入！") ;
            System.out.println("输入格式：java LoginDemo02 zb 123456") ;
            System.exit(1) ;
        }
    }
}
class LoginDemo02{
    public static void main(String []args){
        Operate operate = new Operate(args) ;
        System.out.print(operate.login()) ;
    }
}